When your device is on and left idle for a set period of time, the screen darkens to save battery power, and locks automatically. This lock prevents unwanted actions on the touch screen when you are not using it.

To activate the screen

• Briefly press the power key .

To unlock the screen

• Place a finger on the screen and swipe up or down.

There are several ways to unlock the screen. For more information, see Setting a screen lock.

To lock the screen

• When the screen is active, briefly press the power key .